Lamp.



E. A. KUEN.

LAMP.

. APPLICATION FILED APR.7.1916- },18, Patented May 1, 1917.

2 SHEETS-SHEET I.

i 37 1] ll 58 1 13 44 41 6 56 *'/Z J] 76 x 1 61 E. A. KUEN.

LAMP.

APPLICATION FILED APR. 7. ms.

Patented May 1, 1917.

2 SHEETS-SHEET 2.

EUGENE A. KUEN, OF CINCINNATI, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TOTHE CORCORAN-VIC'LOR COMPANY, OF CINCINNATI, OHIO, CORPORATION 0310.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed April 7, 1916. Serial No. 89,651..

To all whom it may concern:

Be it known that I, EUGENE A. K UEN, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Lamps, of which thefollowing is a specificatlon.

My invention relates to that character of lamps having a rotatable dooror closure comprising a transparent member through which the rays oflight are projected, and is exemplified in a so-called headlight usedfor instance, on motor-driven vehicles.

Lamps of this character are subjected to a great deal of vibration andjar during the traveling of the vehicle. It has been found heretofore instructures of this character, that the rotatable closure has become lostduring traveling, owing to such vibrations and jars, the closuregradually rotating in unclamping direction in spite of having beensupposedly securely fastened.

It is the object of my invention to provide means I whereby when closingrotation between the closure and body has been effected, the closure isheld with relation to the body by locking faces extending in a directionparallel with the focal axis of the reflector; to provide novel latchingmeans between the closure and the body normally in obstructing relationand arranged to be I automatically moved out of obstructing relation soas to place the closure in rotative relation with the body, and to beautomatically pressed into obstructing relation for preventingunclamping rotation between the closure and the body, when the closureis seated; and, further, to provide means whereby the closure is drawntoward the body of the lamp in lines substantially parallel to thefocalaxis of the reflector by rotative movement between the closure and body,and latching means between the closure and the body automaticallymovable in a direction substantially radial to said rotative movement,whereby rotation of the closure in reverse direction is prevented.

The invention will be further readily understood from the f followingdescription and claims, and from the drawings, in which latter Figure 1vii-i a horizontal cross-section of my improved device, taken in theplane of the line 1-1 of Fig. 4., but with the closure .in positionabout to engage the latch.

Fig. 2 is a similar view, partly broken .received.

away, with the closure engaging the end of the latch, the latch shown inwithdrawn position.

Fig. 3 is a similar .view with the closure rotated and the latch inengaged relation.

Fig. 4 is a front elevation of my improved device with the parts partlybroken away and the latch shown in the relation illustrated in Fig. 2.

Fig. 5 is a similar view with the latch in the relation illustrated inFig. 3.

Fig. 6 is a longitudinal section taken in the plane of the line 66 ofFig. 3, and

The body of the lamp is represented at i 11. It is exemplified as havingan inwardly extending annular flange 12 bent inwardly from asubstantially cylindrical portion 13. at the forward end of the body ofthe lamp, an annular space 14 being in rear of the The body is shown ofparabolic form, merging into an outwardly flaring annular portion 15 atits forward end.

A reflector, shown of parabolic form, is exemplified at 18. Thereflector is received in the cavity of the body and has an opening 19 atits front end. The reflector, in the form shown, is provided at itsforward end with a laterally outwardly extending annular flange 20,extending laterally from a forwardly extending annular bulge 21, whichat its apex is provided with an annular groove 22, in which an annularcushionmember 23, shown in the form of a cord, is The annular cushionmember may be a cord, fabric, or rubber annularly arranged to coact withthe closure for exeluding dust, water, or foreign substances from theinside of the reflector.

The closure of the lamp is represented at 25, serving as a door. It isexemplified as tion comprises an outer wall 29 and an inner wall 30. Theouter Wall comprises an inwardly extending annular portion 31 againstwhich the outer face of the glass 27 is arranged to be received. Theinner wall is shown formed with a radially extending ledge 32, which isan annular ledge.

A suitable illuminating device, shown as an electric incandescentlampbulb 36, is

provided and is shown'releasably attached to a suitable socket 37, heldin a thimble 38 at the rear end of the reflector, or the socket may, ifdesired, have a suitable focusing arrangement connected therewith asexemplified more fully in said aforementioned patent.

Retaining means are provided for the closure, exemplified as extendingbetween the body and closure for limiting movement between said body andclosure when in connected relation indirections substantially parallelto the principal axis of the reflector.

These means are exemplified as hooks 41 secured to the flange 12, beingpreferably spring-hooks, in the present instance respectively comprisinga base 42 which at a point preferably intermediate of its ends issecured to the rear face of the flange 12 by a tension-member, shown asa screw 43, passing through the flange and received in a threaded socket44 in the base. The hook further comprises a shank 45 bent preferably atsubstantial right angles to the base and having a bend 46 between thebase and shank forming a spring. The finger 47 of the hook extends fromthe shank in the general direction of the flange and is shown curved tocorrespond substantiallyto the curvature of the annular flange. It isprovided with a sloping contact-face 48. The hook is preferably formedof steel and tempered so as to form a spring-hook. There is a series ofthese hooks arranged about the flange, three hooks being exemplifiedequal distances apart.

Means are also exemplified for resiliently positioningthe reflector withrelation to the body, shown accomplished by springs 51 placed preferablyat the respective hooks and exemplified as leaf-springs. These springsare shown provided respectively with slots 52 through which the shanksof the hooks project, and with positioning lips 53 received in holes 54in the flange 12.

The annular flange 20 of the reflector is shown as provided with slots55 to register with the hooks, the finger-ends of the hooks beingreceived through said slots, the slots extending preferably in thegeneral direc tion of the annular flange'20, being shown curved tocorrespond substantially to the curvature of said annular flange. Theflange 20 is provided with a rearwardly extending knob 56 arranged to bereceived in one of the slots 52 of the sprin s 51 for preventingunintentional turning 0% the reflector.

The radially extending ledge 32 of the closure is exemplified asprovided with slots 58 in which the outer ends of the hooks 41 arearranged to be received, being received, in the present exemplification,into the cavity 59 between the walls of the ring-member. The slots 58extend in the general direction of the ledge and are curved 'tocorrespond substantially to the curvature of the ring-member.

The closure or door is assembled with the body and reflector by means ofa rotary movement, and means are provided for maintaining the rotativerelation between the body or reflector and the closure, which areautomatically yieldable by movement of the closure toward the body inthe general direction of the principal axis of the reflector whenconnecting the closure with the body, and are arranged to beautomatically positioned in looking relation when proper rotativemovement has been had between the closure and body for locking theclosure to the body.

I have exemplified this latch as on the body at 61, normally pressedoutwardly by means of a spring 62 and having an inclined contact-face 63arranged to be contacted by the rear annular edge 64 of the closure forpushing the latch inwardly when assembling the closure on the body. Thelatch is ar ranged to be pressed inwardly by means of a knob 65 whenreleasing the closure. The latch is received through an opening 66 inthe cylindrical portion 13 of the body and is arranged to beautomatically received in a recess 67, forming a keeper in the wall 30of the closure. The spring 62 is located in the annular space 14 of thebody. The latch is shown formed by bending the metal of the spring band,forming front and rear stretches, the lateral walls 68, which coact withthe end walls 70, of the opening 66, and with theend walls 7 2, of therecess 67, forming end-faces between the latch and the walls of theopening and recess, which extend in planes substantially parallel to theprincipal axis of the reflector, so that when the latch is-in latchingposition rotative movement of the closure for releasing the same will beprevented by a face which extends substantially at right angles to therotative movement of the closure.

The spring 62 is exemplified as a bowed leaf-spring, one end of which issecured to the flange 12 of the body, as by means of a screw 75 receivedthrough an opening in the flange and having threaded engagement with athreaded lug 76 fast to the sprlng.

The knob 65 is received through an opening 77 in the body normallyclosed by the knob and a nut 82, the washer being between the spring andshoulder.

The wall 30 of the closure preferably has a shoulder 83 in annulararrangement thereabout and arranged to coact with the annular outer edge84: of the body for forming a stop between the closure and body, so thatthe closure may be held tightly toward the body and vibration betweenthe closure and body prevented by reason of coaction between the stops.

In assembling the closure upon the body, the closure is placed incentral position in front of the body, so that the peripheral edge ofthe closure is presented to the inclined face of the latch, asexemplified in Fig.1. Upon pressure of the closure toward the, body, theinner annular edge of the closure will contact saidinclined face andmovement of said edge therealong in the general direction of theprincipal axis of the reflector will cause recession of the latch andengagement of its outer end with the annular inner wall 30 of theclosure. (See Fig. 2). This movement of the closure will cause the slotstherein to be received about the hooks, it being assumed that thereflector has been positioned under the fingers of the hooks.

Rotative movement is thereupon applied to the closure. This movementwill cause the end walls 87 of the slots 58 to impinge the slantingcontact-faces 48 of the fingers 47 and thereby draw the closure towardthe body until firm contact is made between the stops 83, 84, therotation of the closure being continued so as to cause the resilience ofthe spring hooks to act, the said ends 87 of said slots climbing uponsaid inclined contact faces 48. When proper seating of the door has beencom leted, the recess 67 in the wall 30 of the c osure will have reachedthe latch, which thereupon is automatically forced outwardly by thespring 62, (see Figs. 3 and 5), for preventmg retrograde movement of theclosure during the travel of the vehicle and in spite of any vibrationor jarring which the'headlight may receive in use. The assembling of theheadlight isaccomplished without manipulation of the latch.

If it is desired to release the closure it is necessary only to pressupon the knob for withdrawing the latch 61 from the recess 67.

On rotation of the door the outer end of the latch is maintained incontact with the inner wall 30 of the closure for preventingreengagement between the closure and latch to permit complete removal ofthe closure.

In my improved construction the closure is readily applied to the bodywithout manual actuation of any latch, the'latch automatically operatingto retract and also to engage, and in releasing the closure it isnecessary only 'to actuate the knob for momentarily releasing the latch,whereupon the closure may be'removed Without further attention given thelatch.

Having thus fully described my invention, What I claim as new and desireto Letters Patent, is: I

1. In a lamp, the combination of a body, a reflector, a closure, meansbetween said body and closure for causing relative approach between saidclosure and body parallel to the line of the principal axis of thereflector, and a latch between said body and closure arranged forautomatically receding by movement of said closure toward said body andautomatically'moving into locking relation at the completion of saidrotative movement between said closure and body.

2. In a lamp, the combination of a body, a reflector, a closure, meansbetween the body and closure for relative approach between the same byrotative movement of the closure, and a resilient latch and keepertherefor between'the body and closure comprising a slanting contact-faceslanting relative to the line of approach between said body and closurefor automatic Withdrawal of said latch by contact thereof,- said latchautomatically coacting with ,said keeper on completion of said rotativemovement, and manual means for withdrawing said latch.

3. In a lamp, the combination of a body, a reflector and a closure,means between said closure and body for causing relative approachbetween said closure and body byrotative'movement of said closure, andalatch on said body, said closure provided with a recess for said latch,said latch provi ded with an inclined face contacted by said closure,said recess bein out of rangeof said latch on contact thereo by saidclosure, and said recess brought into range of said latch by saidrotative movement of said closure, said recess and latch havin wallsbetween .them extending substantial y parallel with the radial lines ofsaid reflector at said latch.

In testimony whereof, I have hereunto signed my name in thepresence oftwo subscribing witnesses.

EUGENE A. KUEN.

Witnesses v THERESA M. Srmmn, Dawson E. BRADLEY.

